The QSFP-10000-SR4 is a short range multimode 100G QSFP28 optical module reaching up to 100m over special MPO 50/125um multi-mode fiber. The QSFP28 interface is actually having 4 25G SR powered 850nm combined together over same MPO fiber cable.

The QSFP-10010-LR4 is a long range single-mode 100G QSFP28 optical module compatible with LR4 standard, reaching up to 10Km on 9/125um fiber. The QSFP28 interface is actually having 4 x 25G CWDM lasers 1271~1331nm combined together over same fiber

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